Get an idler arm for a 68-69 dart, you have t bars and older style suspension...right?
If that is a 73 n up idler....that's the problem.
Think about it... if you brought the pitman up to match... it will hit the pan.
Totally incorrect information. You can not just slap a 72 down arm on a 73 up drag link like the OP has. The taper is wrong in drag link also. All he needs is the correct 73 up idler arm.